X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=util-linux%2Fmkfs_minix.c;h=0dfe34705213a88948704c0b832a921cb0236645;hb=52a515d18724bbb34e3ccbbb0218efcc4eccc0a8;hp=b90d3a70081d98b84b72679fad75ee31887a1da4;hpb=d73dc5b07390fb90e7f605871c993a28eedf1d46;p=oweals%2Fbusybox.git diff --git a/util-linux/mkfs_minix.c b/util-linux/mkfs_minix.c index b90d3a700..0dfe34705 100644 --- a/util-linux/mkfs_minix.c +++ b/util-linux/mkfs_minix.c @@ -1,8 +1,10 @@ +/* vi: set sw=4 ts=4: */ /* * mkfs.c - make a linux (minix) file-system. * - * (C) 1991 Linus Torvalds. This file may be redistributed as per - * the Linux copyright. + * (C) 1991 Linus Torvalds. + * + * Licensed under GPLv2, see file LICENSE in this source tree. */ /* @@ -32,9 +34,9 @@ * 03.01.94 - Added support for file system valid flag. * (Dr. Wettstein, greg%wind.uucp@plains.nodak.edu) * - * 30.10.94 - added support for v2 filesystem - * (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de) - * + * 30.10.94 - added support for v2 filesystem + * (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de) + * * 09.11.94 - Added test to prevent overwrite of mounted fs adapted * from Theodore Ts'o's (tytso@athena.mit.edu) mke2fs * program. (Daniel Quinlan, quinlan@yggdrasil.com) @@ -48,261 +50,226 @@ * * Usage: mkfs [-c | -l filename ] [-v] [-nXX] [-iXX] device [size-in-blocks] * - * -c for readablility checking (SLOW!) + * -c for readability checking (SLOW!) * -l for getting a list of bad blocks from a file. * -n for namelength (currently the kernel only uses 14 or 30) * -i for number of inodes * -v for v2 filesystem * * The device may be a block device or a image of one, but this isn't - * enforced (but it's not much fun on a character device :-). + * enforced (but it's not much fun on a character device :-). + * + * Modified for BusyBox by Erik Andersen -- + * removed getopt based parser and added a hand rolled one. */ - -#include "internal.h" -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include +//config:config MKFS_MINIX +//config: bool "mkfs_minix" +//config: default y +//config: select PLATFORM_LINUX +//config: help +//config: The minix filesystem is a nice, small, compact, read-write filesystem +//config: with little overhead. If you wish to be able to create minix +//config: filesystems this utility will do the job for you. +//config: +//config:config FEATURE_MINIX2 +//config: bool "Support Minix fs v2 (fsck_minix/mkfs_minix)" +//config: default y +//config: depends on FSCK_MINIX || MKFS_MINIX +//config: help +//config: If you wish to be able to create version 2 minix filesystems, enable +//config: this. If you enabled 'mkfs_minix' then you almost certainly want to +//config: be using the version 2 filesystem support. + +// APPLET_ODDNAME:name main location suid_type help +//applet:IF_MKFS_MINIX(APPLET_ODDNAME(mkfs.minix, mkfs_minix, BB_DIR_SBIN, BB_SUID_DROP, mkfs_minix)) + +//kbuild:lib-$(CONFIG_MKFS_MINIX) += mkfs_minix.o + +//usage:#define mkfs_minix_trivial_usage +//usage: "[-c | -l FILE] [-nXX] [-iXX] BLOCKDEV [KBYTES]" +//usage:#define mkfs_minix_full_usage "\n\n" +//usage: "Make a MINIX filesystem\n" +//usage: "\n -c Check device for bad blocks" +//usage: "\n -n [14|30] Maximum length of filenames" +//usage: "\n -i INODES Number of inodes for the filesystem" +//usage: "\n -l FILE Read bad blocks list from FILE" +//usage: "\n -v Make version 2 filesystem" + +#include "libbb.h" #include -#include -#include -#include +#include "minix.h" -#ifdef MINIX2_SUPER_MAGIC2 -#define HAVE_MINIX2 1 +/* Store the very same times/uids/gids for image consistency */ +#if 1 +# define CUR_TIME 0 +# define GETUID 0 +# define GETGID 0 +#else +/* Was using this. Is it useful? NB: this will break testsuite */ +# define CUR_TIME time(NULL) +# define GETUID getuid() +# define GETGID getgid() #endif -#ifndef __GNUC__ -#error "needs gcc for the bitop-__asm__'s" -#endif +enum { + MAX_GOOD_BLOCKS = 512, + TEST_BUFFER_BLOCKS = 16, +}; -#ifndef __linux__ -#define volatile +#if !ENABLE_FEATURE_MINIX2 +enum { version2 = 0 }; #endif -#define MINIX_ROOT_INO 1 -#define MINIX_BAD_INO 2 +enum { dev_fd = 3 }; -#define TEST_BUFFER_BLOCKS 16 -#define MAX_GOOD_BLOCKS 512 - -#define UPPER(size,n) (((size)+((n)-1))/(n)) -#define INODE_SIZE (sizeof(struct minix_inode)) -#ifdef HAVE_MINIX2 -#define INODE_SIZE2 (sizeof(struct minix2_inode)) -#define INODE_BLOCKS UPPER(INODES, (version2 ? MINIX2_INODES_PER_BLOCK \ - : MINIX_INODES_PER_BLOCK)) -#else -#define INODE_BLOCKS UPPER(INODES, (MINIX_INODES_PER_BLOCK)) +struct globals { +#if ENABLE_FEATURE_MINIX2 + smallint version2; +#define version2 G.version2 #endif -#define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE) - -#define BITS_PER_BLOCK (BLOCK_SIZE<<3) - -static char * program_name = "mkfs"; -static char * device_name = NULL; -static int DEV = -1; -static long BLOCKS = 0; -static int check = 0; -static int badblocks = 0; -static int namelen = 30; /* default (changed to 30, per Linus's - suggestion, Sun Nov 21 08:05:07 1993) */ -static int dirsize = 32; -static int magic = MINIX_SUPER_MAGIC2; -static int version2 = 0; - -static char root_block[BLOCK_SIZE] = "\0"; - -static char * inode_buffer = NULL; -#define Inode (((struct minix_inode *) inode_buffer)-1) -#ifdef HAVE_MINIX2 -#define Inode2 (((struct minix2_inode *) inode_buffer)-1) -#endif -static char super_block_buffer[BLOCK_SIZE]; -static char boot_block_buffer[512]; -#define Super (*(struct minix_super_block *)super_block_buffer) -#define INODES ((unsigned long)Super.s_ninodes) -#ifdef HAVE_MINIX2 -#define ZONES ((unsigned long)(version2 ? Super.s_zones : Super.s_nzones)) -#else -#define ZONES ((unsigned long)(Super.s_nzones)) -#endif -#define IMAPS ((unsigned long)Super.s_imap_blocks) -#define ZMAPS ((unsigned long)Super.s_zmap_blocks) -#define FIRSTZONE ((unsigned long)Super.s_firstdatazone) -#define ZONESIZE ((unsigned long)Super.s_log_zone_size) -#define MAXSIZE ((unsigned long)Super.s_max_size) -#define MAGIC (Super.s_magic) -#define NORM_FIRSTZONE (2+IMAPS+ZMAPS+INODE_BLOCKS) + char *device_name; + uint32_t total_blocks; + int badblocks; + int namelen; + int dirsize; + int magic; + char *inode_buffer; + char *inode_map; + char *zone_map; + int used_good_blocks; + unsigned long req_nr_inodes; + unsigned currently_testing; + + char root_block[BLOCK_SIZE]; + char superblock_buffer[BLOCK_SIZE]; + char boot_block_buffer[512]; + unsigned short good_blocks_table[MAX_GOOD_BLOCKS]; + /* check_blocks(): buffer[] was the biggest static in entire bbox */ + char check_blocks_buffer[BLOCK_SIZE * TEST_BUFFER_BLOCKS]; + + unsigned short ind_block1[BLOCK_SIZE >> 1]; + unsigned short dind_block1[BLOCK_SIZE >> 1]; + unsigned long ind_block2[BLOCK_SIZE >> 2]; + unsigned long dind_block2[BLOCK_SIZE >> 2]; +}; +#define G (*ptr_to_globals) +#define INIT_G() do { \ + SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \ +} while (0) + +static ALWAYS_INLINE unsigned div_roundup(unsigned size, unsigned n) +{ + return (size + n-1) / n; +} -static char *inode_map; -static char *zone_map; +#define INODE_BUF1 (((struct minix1_inode*)G.inode_buffer) - 1) +#define INODE_BUF2 (((struct minix2_inode*)G.inode_buffer) - 1) -static unsigned short good_blocks_table[MAX_GOOD_BLOCKS]; -static int used_good_blocks = 0; -static unsigned long req_nr_inodes = 0; +#define SB (*(struct minix_superblock*)G.superblock_buffer) -#define inode_in_use(x) (bit(inode_map,(x))) -#define zone_in_use(x) (bit(zone_map,(x)-FIRSTZONE+1)) +#define SB_INODES (SB.s_ninodes) +#define SB_IMAPS (SB.s_imap_blocks) +#define SB_ZMAPS (SB.s_zmap_blocks) +#define SB_FIRSTZONE (SB.s_firstdatazone) +#define SB_ZONE_SIZE (SB.s_log_zone_size) +#define SB_MAXSIZE (SB.s_max_size) +#define SB_MAGIC (SB.s_magic) -#define mark_inode(x) (setbit(inode_map,(x))) -#define unmark_inode(x) (clrbit(inode_map,(x))) +#if !ENABLE_FEATURE_MINIX2 +# define SB_ZONES (SB.s_nzones) +# define INODE_BLOCKS div_roundup(SB_INODES, MINIX1_INODES_PER_BLOCK) +#else +# define SB_ZONES (version2 ? SB.s_zones : SB.s_nzones) +# define INODE_BLOCKS div_roundup(SB_INODES, \ + (version2 ? MINIX2_INODES_PER_BLOCK : MINIX1_INODES_PER_BLOCK)) +#endif -#define mark_zone(x) (setbit(zone_map,(x)-FIRSTZONE+1)) -#define unmark_zone(x) (clrbit(zone_map,(x)-FIRSTZONE+1)) +#define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE) +#define NORM_FIRSTZONE (2 + SB_IMAPS + SB_ZMAPS + INODE_BLOCKS) -/* - * Volatile to let gcc know that this doesn't return. When trying - * to compile this under minix, volatile gives a warning, as - * exit() isn't defined as volatile under minix. - */ -static volatile void die(char *str) { - fprintf(stderr, "%s: %s\n", program_name, str); - exit(8); -} +/* Before you ask "where they come from?": */ +/* setbit/clrbit are supplied by sys/param.h */ -static volatile void show_usage() +static int minix_bit(const char* a, unsigned i) { - fprintf(stderr, "BusyBox v%s (%s) multi-call binary -- GPL2\n\n", BB_VER, BB_BT); - fprintf(stderr, "Usage: %s [-c | -l filename] [-nXX] [-iXX] /dev/name [blocks]\n\n", program_name); - fprintf(stderr, "Make a MINIX filesystem.\n\n"); - fprintf(stderr, "OPTIONS:\n"); - fprintf(stderr, "\t-c\t\tCheck the device for bad blocks\n"); - fprintf(stderr, "\t-n [14|30]\tSpecify the maximum length of filenames\n"); - fprintf(stderr, "\t-i\t\tSpecify the number of inodes for the filesystem\n"); - fprintf(stderr, "\t-l FILENAME\tRead the bad blocks list from FILENAME\n"); - fprintf(stderr, "\t-v\t\tMake a Minix version 2 filesystem\n\n"); - exit(16); + return a[i >> 3] & (1<<(i & 7)); } -/* - * Check to make certain that our new filesystem won't be created on - * an already mounted partition. Code adapted from mke2fs, Copyright - * (C) 1994 Theodore Ts'o. Also licensed under GPL. - */ -static void check_mount(void) +static void minix_setbit(char *a, unsigned i) { - FILE * f; - struct mntent * mnt; - - if ((f = setmntent (MOUNTED, "r")) == NULL) - return; - while ((mnt = getmntent (f)) != NULL) - if (strcmp (device_name, mnt->mnt_fsname) == 0) - break; - endmntent (f); - if (!mnt) - return; - - die("%s is mounted; will not make a filesystem here!"); + setbit(a, i); } - -static long valid_offset (int fd, int offset) +static void minix_clrbit(char *a, unsigned i) { - char ch; - - if (lseek (fd, offset, 0) < 0) - return 0; - if (read (fd, &ch, 1) < 1) - return 0; - return 1; + clrbit(a, i); } -static int count_blocks (int fd) -{ - int high, low; - - low = 0; - for (high = 1; valid_offset (fd, high); high *= 2) - low = high; - while (low < high - 1) - { - const int mid = (low + high) / 2; - - if (valid_offset (fd, mid)) - low = mid; - else - high = mid; - } - valid_offset (fd, 0); - return (low + 1); -} +/* Note: do not assume 0/1, it is 0/nonzero */ +#define zone_in_use(x) minix_bit(G.zone_map,(x)-SB_FIRSTZONE+1) +/*#define inode_in_use(x) minix_bit(G.inode_map,(x))*/ -static int get_size(const char *file) -{ - int fd; - long size; +#define mark_inode(x) minix_setbit(G.inode_map,(x)) +#define unmark_inode(x) minix_clrbit(G.inode_map,(x)) +#define mark_zone(x) minix_setbit(G.zone_map,(x)-SB_FIRSTZONE+1) +#define unmark_zone(x) minix_clrbit(G.zone_map,(x)-SB_FIRSTZONE+1) - fd = open(file, O_RDWR); - if (fd < 0) { - perror(file); - exit(1); - } - if (ioctl(fd, BLKGETSIZE, &size) >= 0) { - close(fd); - return (size * 512); - } - - size = count_blocks(fd); - close(fd); - return size; -} +#ifndef BLKGETSIZE +# define BLKGETSIZE _IO(0x12,96) /* return device size */ +#endif static void write_tables(void) { - /* Mark the super block valid. */ - Super.s_state |= MINIX_VALID_FS; - Super.s_state &= ~MINIX_ERROR_FS; - - if (lseek(DEV, 0, SEEK_SET)) - die("seek to boot block failed in write_tables"); - if (512 != write(DEV, boot_block_buffer, 512)) - die("unable to clear boot sector"); - if (BLOCK_SIZE != lseek(DEV, BLOCK_SIZE, SEEK_SET)) - die("seek failed in write_tables"); - if (BLOCK_SIZE != write(DEV, super_block_buffer, BLOCK_SIZE)) - die("unable to write super-block"); - if (IMAPS*BLOCK_SIZE != write(DEV,inode_map,IMAPS*BLOCK_SIZE)) - die("unable to write inode map"); - if (ZMAPS*BLOCK_SIZE != write(DEV,zone_map,ZMAPS*BLOCK_SIZE)) - die("unable to write zone map"); - if (INODE_BUFFER_SIZE != write(DEV,inode_buffer,INODE_BUFFER_SIZE)) - die("unable to write inodes"); - + /* Mark the superblock valid. */ + SB.s_state |= MINIX_VALID_FS; + SB.s_state &= ~MINIX_ERROR_FS; + + msg_eol = "seek to 0 failed"; + xlseek(dev_fd, 0, SEEK_SET); + + msg_eol = "can't clear boot sector"; + xwrite(dev_fd, G.boot_block_buffer, 512); + + msg_eol = "seek to BLOCK_SIZE failed"; + xlseek(dev_fd, BLOCK_SIZE, SEEK_SET); + + msg_eol = "can't write superblock"; + xwrite(dev_fd, G.superblock_buffer, BLOCK_SIZE); + + msg_eol = "can't write inode map"; + xwrite(dev_fd, G.inode_map, SB_IMAPS * BLOCK_SIZE); + + msg_eol = "can't write zone map"; + xwrite(dev_fd, G.zone_map, SB_ZMAPS * BLOCK_SIZE); + + msg_eol = "can't write inodes"; + xwrite(dev_fd, G.inode_buffer, INODE_BUFFER_SIZE); + + msg_eol = "\n"; } -static void write_block(int blk, char * buffer) +static void write_block(int blk, char *buffer) { - if (blk*BLOCK_SIZE != lseek(DEV, blk*BLOCK_SIZE, SEEK_SET)) - die("seek failed in write_block"); - if (BLOCK_SIZE != write(DEV, buffer, BLOCK_SIZE)) - die("write failed in write_block"); + xlseek(dev_fd, blk * BLOCK_SIZE, SEEK_SET); + xwrite(dev_fd, buffer, BLOCK_SIZE); } static int get_free_block(void) { int blk; - if (used_good_blocks+1 >= MAX_GOOD_BLOCKS) - die("too many bad blocks"); - if (used_good_blocks) - blk = good_blocks_table[used_good_blocks-1]+1; + if (G.used_good_blocks + 1 >= MAX_GOOD_BLOCKS) + bb_error_msg_and_die("too many bad blocks"); + if (G.used_good_blocks) + blk = G.good_blocks_table[G.used_good_blocks - 1] + 1; else - blk = FIRSTZONE; - while (blk < ZONES && zone_in_use(blk)) + blk = SB_FIRSTZONE; + while (blk < SB_ZONES && zone_in_use(blk)) blk++; - if (blk >= ZONES) - die("not enough good blocks"); - good_blocks_table[used_good_blocks] = blk; - used_good_blocks++; + if (blk >= SB_ZONES) + bb_error_msg_and_die("not enough good blocks"); + G.good_blocks_table[G.used_good_blocks] = blk; + G.used_good_blocks++; return blk; } @@ -310,15 +277,15 @@ static void mark_good_blocks(void) { int blk; - for (blk=0 ; blk < used_good_blocks ; blk++) - mark_zone(good_blocks_table[blk]); + for (blk = 0; blk < G.used_good_blocks; blk++) + mark_zone(G.good_blocks_table[blk]); } -inline int next(int zone) +static int next(int zone) { if (!zone) - zone = FIRSTZONE-1; - while (++zone < ZONES) + zone = SB_FIRSTZONE - 1; + while (++zone < SB_ZONES) if (zone_in_use(zone)) return zone; return 0; @@ -326,90 +293,101 @@ inline int next(int zone) static void make_bad_inode(void) { - struct minix_inode * inode = &Inode[MINIX_BAD_INO]; - int i,j,zone; - int ind=0,dind=0; - unsigned short ind_block[BLOCK_SIZE>>1]; - unsigned short dind_block[BLOCK_SIZE>>1]; + struct minix1_inode *inode = &INODE_BUF1[MINIX_BAD_INO]; + int i, j, zone; + int ind = 0, dind = 0; + /* moved to globals to reduce stack usage + unsigned short ind_block[BLOCK_SIZE >> 1]; + unsigned short dind_block[BLOCK_SIZE >> 1]; + */ +#define ind_block (G.ind_block1) +#define dind_block (G.dind_block1) #define NEXT_BAD (zone = next(zone)) - if (!badblocks) + if (!G.badblocks) return; mark_inode(MINIX_BAD_INO); inode->i_nlinks = 1; - inode->i_time = time(NULL); + /* BTW, setting this makes all images different */ + /* it's harder to check for bugs then - diff isn't helpful :(... */ + inode->i_time = CUR_TIME; inode->i_mode = S_IFREG + 0000; - inode->i_size = badblocks*BLOCK_SIZE; + inode->i_size = G.badblocks * BLOCK_SIZE; zone = next(0); - for (i=0 ; i<7 ; i++) { + for (i = 0; i < 7; i++) { inode->i_zone[i] = zone; if (!NEXT_BAD) goto end_bad; } inode->i_zone[7] = ind = get_free_block(); - memset(ind_block,0,BLOCK_SIZE); - for (i=0 ; i<512 ; i++) { + memset(ind_block, 0, BLOCK_SIZE); + for (i = 0; i < 512; i++) { ind_block[i] = zone; if (!NEXT_BAD) goto end_bad; } inode->i_zone[8] = dind = get_free_block(); - memset(dind_block,0,BLOCK_SIZE); - for (i=0 ; i<512 ; i++) { - write_block(ind,(char *) ind_block); + memset(dind_block, 0, BLOCK_SIZE); + for (i = 0; i < 512; i++) { + write_block(ind, (char *) ind_block); dind_block[i] = ind = get_free_block(); - memset(ind_block,0,BLOCK_SIZE); - for (j=0 ; j<512 ; j++) { + memset(ind_block, 0, BLOCK_SIZE); + for (j = 0; j < 512; j++) { ind_block[j] = zone; if (!NEXT_BAD) goto end_bad; } } - die("too many bad blocks"); -end_bad: + bb_error_msg_and_die("too many bad blocks"); + end_bad: if (ind) write_block(ind, (char *) ind_block); if (dind) write_block(dind, (char *) dind_block); +#undef ind_block +#undef dind_block } -#ifdef HAVE_MINIX2 -static void -make_bad_inode2 (void) +#if ENABLE_FEATURE_MINIX2 +static void make_bad_inode2(void) { - struct minix2_inode *inode = &Inode2[MINIX_BAD_INO]; + struct minix2_inode *inode = &INODE_BUF2[MINIX_BAD_INO]; int i, j, zone; int ind = 0, dind = 0; + /* moved to globals to reduce stack usage unsigned long ind_block[BLOCK_SIZE >> 2]; unsigned long dind_block[BLOCK_SIZE >> 2]; + */ +#define ind_block (G.ind_block2) +#define dind_block (G.dind_block2) - if (!badblocks) + if (!G.badblocks) return; - mark_inode (MINIX_BAD_INO); + mark_inode(MINIX_BAD_INO); inode->i_nlinks = 1; - inode->i_atime = inode->i_mtime = inode->i_ctime = time (NULL); + inode->i_atime = inode->i_mtime = inode->i_ctime = CUR_TIME; inode->i_mode = S_IFREG + 0000; - inode->i_size = badblocks * BLOCK_SIZE; - zone = next (0); + inode->i_size = G.badblocks * BLOCK_SIZE; + zone = next(0); for (i = 0; i < 7; i++) { inode->i_zone[i] = zone; if (!NEXT_BAD) goto end_bad; } - inode->i_zone[7] = ind = get_free_block (); - memset (ind_block, 0, BLOCK_SIZE); + inode->i_zone[7] = ind = get_free_block(); + memset(ind_block, 0, BLOCK_SIZE); for (i = 0; i < 256; i++) { ind_block[i] = zone; if (!NEXT_BAD) goto end_bad; } - inode->i_zone[8] = dind = get_free_block (); - memset (dind_block, 0, BLOCK_SIZE); + inode->i_zone[8] = dind = get_free_block(); + memset(dind_block, 0, BLOCK_SIZE); for (i = 0; i < 256; i++) { - write_block (ind, (char *) ind_block); - dind_block[i] = ind = get_free_block (); - memset (ind_block, 0, BLOCK_SIZE); + write_block(ind, (char *) ind_block); + dind_block[i] = ind = get_free_block(); + memset(ind_block, 0, BLOCK_SIZE); for (j = 0; j < 256; j++) { ind_block[j] = zone; if (!NEXT_BAD) @@ -417,335 +395,318 @@ make_bad_inode2 (void) } } /* Could make triple indirect block here */ - die ("too many bad blocks"); + bb_error_msg_and_die("too many bad blocks"); end_bad: if (ind) - write_block (ind, (char *) ind_block); + write_block(ind, (char *) ind_block); if (dind) - write_block (dind, (char *) dind_block); + write_block(dind, (char *) dind_block); +#undef ind_block +#undef dind_block } +#else +void make_bad_inode2(void); #endif static void make_root_inode(void) { - struct minix_inode * inode = &Inode[MINIX_ROOT_INO]; + struct minix1_inode *inode = &INODE_BUF1[MINIX_ROOT_INO]; mark_inode(MINIX_ROOT_INO); inode->i_zone[0] = get_free_block(); inode->i_nlinks = 2; - inode->i_time = time(NULL); - if (badblocks) - inode->i_size = 3*dirsize; + inode->i_time = CUR_TIME; + if (G.badblocks) + inode->i_size = 3 * G.dirsize; else { - root_block[2*dirsize] = '\0'; - root_block[2*dirsize+1] = '\0'; - inode->i_size = 2*dirsize; + G.root_block[2 * G.dirsize] = '\0'; + G.root_block[2 * G.dirsize + 1] = '\0'; + inode->i_size = 2 * G.dirsize; } inode->i_mode = S_IFDIR + 0755; - inode->i_uid = getuid(); + inode->i_uid = GETUID; if (inode->i_uid) - inode->i_gid = getgid(); - write_block(inode->i_zone[0],root_block); + inode->i_gid = GETGID; + write_block(inode->i_zone[0], G.root_block); } -#ifdef HAVE_MINIX2 -static void -make_root_inode2 (void) +#if ENABLE_FEATURE_MINIX2 +static void make_root_inode2(void) { - struct minix2_inode *inode = &Inode2[MINIX_ROOT_INO]; + struct minix2_inode *inode = &INODE_BUF2[MINIX_ROOT_INO]; - mark_inode (MINIX_ROOT_INO); - inode->i_zone[0] = get_free_block (); + mark_inode(MINIX_ROOT_INO); + inode->i_zone[0] = get_free_block(); inode->i_nlinks = 2; - inode->i_atime = inode->i_mtime = inode->i_ctime = time (NULL); - if (badblocks) - inode->i_size = 3 * dirsize; + inode->i_atime = inode->i_mtime = inode->i_ctime = CUR_TIME; + if (G.badblocks) + inode->i_size = 3 * G.dirsize; else { - root_block[2 * dirsize] = '\0'; - root_block[2 * dirsize + 1] = '\0'; - inode->i_size = 2 * dirsize; + G.root_block[2 * G.dirsize] = '\0'; + G.root_block[2 * G.dirsize + 1] = '\0'; + inode->i_size = 2 * G.dirsize; } inode->i_mode = S_IFDIR + 0755; - inode->i_uid = getuid(); + inode->i_uid = GETUID; if (inode->i_uid) - inode->i_gid = getgid(); - write_block (inode->i_zone[0], root_block); + inode->i_gid = GETGID; + write_block(inode->i_zone[0], G.root_block); } +#else +void make_root_inode2(void); #endif -static void setup_tables(void) -{ - int i; - unsigned long inodes; - - memset(super_block_buffer,0,BLOCK_SIZE); - memset(boot_block_buffer,0,512); - MAGIC = magic; - ZONESIZE = 0; - MAXSIZE = version2 ? 0x7fffffff : (7+512+512*512)*1024; - ZONES = BLOCKS; -/* some magic nrs: 1 inode / 3 blocks */ - if ( req_nr_inodes == 0 ) - inodes = BLOCKS/3; - else - inodes = req_nr_inodes; - /* Round up inode count to fill block size */ -#ifdef HAVE_MINIX2 - if (version2) - inodes = ((inodes + MINIX2_INODES_PER_BLOCK - 1) & - ~(MINIX2_INODES_PER_BLOCK - 1)); - else -#endif - inodes = ((inodes + MINIX_INODES_PER_BLOCK - 1) & - ~(MINIX_INODES_PER_BLOCK - 1)); - if (inodes > 65535) - inodes = 65535; - INODES = inodes; - IMAPS = UPPER(INODES + 1,BITS_PER_BLOCK); - ZMAPS = 0; - i=0; - while (ZMAPS != UPPER(BLOCKS - (2+IMAPS+ZMAPS+INODE_BLOCKS) + 1,BITS_PER_BLOCK) && i<1000) { - ZMAPS = UPPER(BLOCKS - (2+IMAPS+ZMAPS+INODE_BLOCKS) + 1,BITS_PER_BLOCK); - i++; - } - /* Real bad hack but overwise mkfs.minix can be thrown - * in infinite loop... - * try: - * dd if=/dev/zero of=test.fs count=10 bs=1024 - * /sbin/mkfs.minix -i 200 test.fs - * */ - if (i>=999) { - die ("unable to allocate buffers for maps"); - } - FIRSTZONE = NORM_FIRSTZONE; - inode_map = malloc(IMAPS * BLOCK_SIZE); - zone_map = malloc(ZMAPS * BLOCK_SIZE); - if (!inode_map || !zone_map) - die("unable to allocate buffers for maps"); - memset(inode_map,0xff,IMAPS * BLOCK_SIZE); - memset(zone_map,0xff,ZMAPS * BLOCK_SIZE); - for (i = FIRSTZONE ; i= ZONES) + if (G.currently_testing >= SB_ZONES) return; - signal(SIGALRM,alarm_intr); + signal(SIGALRM, alarm_intr); alarm(5); - if (!currently_testing) + if (!G.currently_testing) return; - printf("%d ...", currently_testing); - fflush(stdout); + printf("%d ...", G.currently_testing); + fflush_all(); } static void check_blocks(void) { - int try,got; - static char buffer[BLOCK_SIZE * TEST_BUFFER_BLOCKS]; + size_t try, got; - currently_testing=0; - signal(SIGALRM,alarm_intr); + G.currently_testing = 0; + signal(SIGALRM, alarm_intr); alarm(5); - while (currently_testing < ZONES) { - if (lseek(DEV,currently_testing*BLOCK_SIZE,SEEK_SET) != - currently_testing*BLOCK_SIZE) - die("seek failed in check_blocks"); + while (G.currently_testing < SB_ZONES) { + msg_eol = "seek failed in check_blocks"; + xlseek(dev_fd, G.currently_testing * BLOCK_SIZE, SEEK_SET); + msg_eol = "\n"; try = TEST_BUFFER_BLOCKS; - if (currently_testing + try > ZONES) - try = ZONES-currently_testing; - got = do_check(buffer, try, currently_testing); - currently_testing += got; + if (G.currently_testing + try > SB_ZONES) + try = SB_ZONES - G.currently_testing; + got = do_check(G.check_blocks_buffer, try, G.currently_testing); + G.currently_testing += got; if (got == try) continue; - if (currently_testing < FIRSTZONE) - die("bad blocks before data-area: cannot make fs"); - mark_zone(currently_testing); - badblocks++; - currently_testing++; + if (G.currently_testing < SB_FIRSTZONE) + bb_error_msg_and_die("bad blocks before data-area: cannot make fs"); + mark_zone(G.currently_testing); + G.badblocks++; + G.currently_testing++; } - if (badblocks > 1) - printf("%d bad blocks\n", badblocks); - else if (badblocks == 1) - printf("one bad block\n"); + alarm(0); + printf("%d bad block(s)\n", G.badblocks); } -static void get_list_blocks(filename) -char *filename; +static void get_list_blocks(char *filename) +{ + FILE *listfile; + unsigned long blockno; + + listfile = xfopen_for_read(filename); + while (!feof(listfile)) { + fscanf(listfile, "%lu\n", &blockno); + mark_zone(blockno); + G.badblocks++; + } + printf("%d bad block(s)\n", G.badblocks); +} +static void setup_tables(void) { - FILE *listfile; - unsigned long blockno; - - listfile=fopen(filename,"r"); - if(listfile == (FILE *)NULL) { - die("can't open file of bad blocks"); - } - while(!feof(listfile)) { - fscanf(listfile,"%ld\n", &blockno); - mark_zone(blockno); - badblocks++; - } - if(badblocks > 1) - printf("%d bad blocks\n", badblocks); - else if (badblocks == 1) - printf("one bad block\n"); + unsigned long inodes; + unsigned norm_firstzone; + unsigned sb_zmaps; + unsigned i; + + /* memset(G.superblock_buffer, 0, BLOCK_SIZE); */ + /* memset(G.boot_block_buffer, 0, 512); */ + SB_MAGIC = G.magic; + SB_ZONE_SIZE = 0; + SB_MAXSIZE = version2 ? 0x7fffffff : (7 + 512 + 512 * 512) * 1024; + if (version2) + SB.s_zones = G.total_blocks; + else + SB.s_nzones = G.total_blocks; + + /* some magic nrs: 1 inode / 3 blocks */ + if (G.req_nr_inodes == 0) + inodes = G.total_blocks / 3; + else + inodes = G.req_nr_inodes; + /* Round up inode count to fill block size */ + if (version2) + inodes = (inodes + MINIX2_INODES_PER_BLOCK - 1) & + ~(MINIX2_INODES_PER_BLOCK - 1); + else + inodes = (inodes + MINIX1_INODES_PER_BLOCK - 1) & + ~(MINIX1_INODES_PER_BLOCK - 1); + if (inodes > 65535) + inodes = 65535; + SB_INODES = inodes; + SB_IMAPS = div_roundup(SB_INODES + 1, BITS_PER_BLOCK); + + /* Real bad hack but overwise mkfs.minix can be thrown + * in infinite loop... + * try: + * dd if=/dev/zero of=test.fs count=10 bs=1024 + * mkfs.minix -i 200 test.fs + */ + /* This code is not insane: NORM_FIRSTZONE is not a constant, + * it is calculated from SB_INODES, SB_IMAPS and SB_ZMAPS */ + i = 999; + SB_ZMAPS = 0; + do { + norm_firstzone = NORM_FIRSTZONE; + sb_zmaps = div_roundup(G.total_blocks - norm_firstzone + 1, BITS_PER_BLOCK); + if (SB_ZMAPS == sb_zmaps) goto got_it; + SB_ZMAPS = sb_zmaps; + /* new SB_ZMAPS, need to recalc NORM_FIRSTZONE */ + } while (--i); + bb_error_msg_and_die("incompatible size/inode count, try different -i N"); + got_it: + + SB_FIRSTZONE = norm_firstzone; + G.inode_map = xmalloc(SB_IMAPS * BLOCK_SIZE); + G.zone_map = xmalloc(SB_ZMAPS * BLOCK_SIZE); + memset(G.inode_map, 0xff, SB_IMAPS * BLOCK_SIZE); + memset(G.zone_map, 0xff, SB_ZMAPS * BLOCK_SIZE); + for (i = SB_FIRSTZONE; i < SB_ZONES; i++) + unmark_zone(i); + for (i = MINIX_ROOT_INO; i <= SB_INODES; i++) + unmark_inode(i); + G.inode_buffer = xzalloc(INODE_BUFFER_SIZE); + printf("%lu inodes\n", (unsigned long)SB_INODES); + printf("%lu blocks\n", (unsigned long)SB_ZONES); + printf("Firstdatazone=%lu (%lu)\n", (unsigned long)SB_FIRSTZONE, (unsigned long)norm_firstzone); + printf("Zonesize=%u\n", BLOCK_SIZE << SB_ZONE_SIZE); + printf("Maxsize=%lu\n", (unsigned long)SB_MAXSIZE); } -extern int -mkfs_minix_main(int argc, char ** argv) +int mkfs_minix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int mkfs_minix_main(int argc UNUSED_PARAM, char **argv) { - int i; - char * tmp; - struct stat statbuf; - char * listfile = NULL; - - if (argc && *argv) - program_name = *argv; - if (INODE_SIZE * MINIX_INODES_PER_BLOCK != BLOCK_SIZE) - die("bad inode size"); -#ifdef HAVE_MINIX2 - if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE) - die("bad inode size"); + unsigned opt; + char *tmp; + char *str_i; + char *listfile = NULL; + + INIT_G(); +/* default (changed to 30, per Linus's suggestion, Sun Nov 21 08:05:07 1993) */ + G.namelen = 30; + G.dirsize = 32; + G.magic = MINIX1_SUPER_MAGIC2; + + if (INODE_SIZE1 * MINIX1_INODES_PER_BLOCK != BLOCK_SIZE) + bb_error_msg_and_die("bad inode size"); +#if ENABLE_FEATURE_MINIX2 + if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE) + bb_error_msg_and_die("bad inode size"); #endif - opterr = 0; - while ((i = getopt(argc, argv, "ci:l:n:v")) != EOF) - switch (i) { - case 'c': - check=1; break; - case 'i': - req_nr_inodes = (unsigned long) atol(optarg); - break; - case 'l': - listfile = optarg; break; - case 'n': - i = strtoul(optarg,&tmp,0); - if (*tmp) - show_usage(); - if (i == 14) - magic = MINIX_SUPER_MAGIC; - else if (i == 30) - magic = MINIX_SUPER_MAGIC2; - else - show_usage(); - namelen = i; - dirsize = i+2; - break; - case 'v': -#ifdef HAVE_MINIX2 - version2 = 1; + + opt = getopt32(argv, "ci:l:n:+v", &str_i, &listfile, &G.namelen); + argv += optind; + //if (opt & 1) -c + if (opt & 2) G.req_nr_inodes = xatoul(str_i); // -i + //if (opt & 4) -l + if (opt & 8) { // -n + if (G.namelen == 14) G.magic = MINIX1_SUPER_MAGIC; + else if (G.namelen == 30) G.magic = MINIX1_SUPER_MAGIC2; + else bb_show_usage(); + G.dirsize = G.namelen + 2; + } + if (opt & 0x10) { // -v +#if ENABLE_FEATURE_MINIX2 + version2 = 1; #else - fprintf(stderr,"%s: not compiled with minix v2 support\n",program_name,device_name); - exit(-1); + bb_error_msg_and_die("not compiled with minix v2 support"); #endif - break; - default: - show_usage(); - } - argc -= optind; - argv += optind; - if (argc > 0 && !device_name) { - device_name = argv[0]; - argc--; - argv++; - } - if (argc > 0) { - BLOCKS = strtol(argv[0],&tmp,0); - if (*tmp) { - printf("strtol error: number of blocks not specified"); - show_usage(); - } - } - - if (device_name && !BLOCKS) - BLOCKS = get_size (device_name) / 1024; - if (!device_name || BLOCKS<10) { - show_usage(); - } -#ifdef HAVE_MINIX2 - if (version2) { - if (namelen == 14) - magic = MINIX2_SUPER_MAGIC; - else - magic = MINIX2_SUPER_MAGIC2; - } else + } + + G.device_name = argv[0]; + if (!G.device_name) + bb_show_usage(); + + /* Check if it is mounted */ + if (find_mount_point(G.device_name, 0)) + bb_error_msg_and_die("can't format mounted filesystem"); + + xmove_fd(xopen(G.device_name, O_RDWR), dev_fd); + + G.total_blocks = get_volume_size_in_bytes(dev_fd, argv[1], 1024, /*extend:*/ 1) / 1024; + + if (G.total_blocks < 10) + bb_error_msg_and_die("must have at least 10 blocks"); + + if (version2) { + G.magic = MINIX2_SUPER_MAGIC2; + if (G.namelen == 14) + G.magic = MINIX2_SUPER_MAGIC; + } else if (G.total_blocks > 65535) + G.total_blocks = 65535; +#if 0 + struct stat statbuf; + xfstat(dev_fd, &statbuf, G.device_name); +/* why? */ + if (!S_ISBLK(statbuf.st_mode)) + opt &= ~1; // clear -c (check) +#if 0 +/* I don't know why someone has special code to prevent mkfs.minix + * on IDE devices. Why IDE but not SCSI, etc?... */ + else if (statbuf.st_rdev == 0x0300 || statbuf.st_rdev == 0x0340) + /* what is this? */ + bb_error_msg_and_die("will not try " + "to make filesystem on '%s'", G.device_name); #endif - if (BLOCKS > 65535) - BLOCKS = 65535; - check_mount(); /* is it already mounted? */ - tmp = root_block; - *(short *)tmp = 1; - strcpy(tmp+2,"."); - tmp += dirsize; - *(short *)tmp = 1; - strcpy(tmp+2,".."); - tmp += dirsize; - *(short *)tmp = 2; - strcpy(tmp+2,".badblocks"); - DEV = open(device_name,O_RDWR ); - if (DEV<0) - die("unable to open %s"); - if (fstat(DEV,&statbuf)<0) - die("unable to stat %s"); - if (!S_ISBLK(statbuf.st_mode)) - check=0; - else if (statbuf.st_rdev == 0x0300 || statbuf.st_rdev == 0x0340) - die("will not try to make filesystem on '%s'"); - setup_tables(); - if (check) - check_blocks(); - else if (listfile) - get_list_blocks(listfile); -#ifdef HAVE_MINIX2 - if (version2) { - make_root_inode2 (); - make_bad_inode2 (); - } else #endif - { - make_root_inode(); - make_bad_inode(); - } - mark_good_blocks(); - write_tables(); - return 0; + tmp = G.root_block; + *(short *) tmp = 1; + strcpy(tmp + 2, "."); + tmp += G.dirsize; + *(short *) tmp = 1; + strcpy(tmp + 2, ".."); + tmp += G.dirsize; + *(short *) tmp = 2; + strcpy(tmp + 2, ".badblocks"); + + setup_tables(); + + if (opt & 1) // -c ? + check_blocks(); + else if (listfile) + get_list_blocks(listfile); + + if (version2) { + make_root_inode2(); + make_bad_inode2(); + } else { + make_root_inode(); + make_bad_inode(); + } + + mark_good_blocks(); + write_tables(); + return 0; }